Oil mill



i Sept. 16, 1930. l R. HOPKINS 1,775,721

' oIL MILL Filed Nov. 1e.V 15mg 2 sheets-sheet 2 OOOOO (DOOOOA gwuentoz fao .4 Pnt/Bataafse 1s, 1930 PATENT er1-ice ROBERT C. HQPXINB, F ALLIANCE, OHIO -originan.

Application mea number 1e, 1999. semi No. 407,616.

The invention relates lto rotary' mills-for cuttin mixing and attrition of the heavy partie es of oils and the like; and the present lnvention is an improvement upon my col nding applications, Serial No. 260,863, filed arch 12, 1928 and Serial No. 394,351, filed September 21, 1929.

\ The object of the'improvement is to 'provide a mill adapted to cut, grind and mix the freely through pipe lines, valves and other apparatus such as is ordinaril the circulating system to an oll burner and the like.

It is wellknown that fuel oil, such as is commonly used for oil burners in furnaces and the like, comprises a considerable portion of slud e or heavy particles which will not freely lgow through the circulating system, fre uently clogging the same and causing trou le and inconvenience."

4The object vof the present improvement is to provide amill for entirely breaking up and pu verizing the heavy .portions of the oil or other substance to such an extent that it may freely pass throu h the circulating system and be burned in t e burners. e

vThe above and other-objects may be attained by providing a housing within which is located two sets of circular saws arranged to'coo crate to cut, grind and mix vthe heavy partie es of the oil and discharge the same tangentially into an attrition chamber in whichV the oil will rotate, a perforate discharge tube being located through the cen tral portion of, the chamber, whereb the centrlfugal action of the rotating oi will send the heavier particles to the outside, bringing them repeatedly into contact-with the cuttin teeth of the saws and permitting only the lighter and iinerportions of the oil to be discharged.

A further feature of the invention consists in the provision of multiple attrition cham-l bers, each of which is provided with a perforate discharge tube as above described, the

ifzups communicating with a discharge maniheavy particles of oil or other substance, to such an extent that it is thoroughly mixed of, the same consistency and in condition to flowincluded in The above and other objects may belattained by constructing the mill in the manner illustrated in the accompanying drawings, in which Figure 1 is an end elevation of the improved mill;

' Fig. 2, a tranverse sectional view through lie same taken substantially on the line2-2,

Fig.. 3, a longitudinal sectional view taken substantially on the line 3 3, Fig. 2; and

Fi 4, a plansectional view taken substantlally on the line 4-4, Fig. 3.

Similar numerals refer to similar parts throughout the drawin The mill includes the ousing 10 preferably of greater height than its width, aslllustrated in the drawings, and provided with the removable caps 11 at each end having they an-` nular flanges 12 through which cap screws 13 may be located for attaching the same to the housing.

Bearings 14 are formed within the `caps and may be provided with the bushings 15 within which arejournaled the parallel shafts 16 extending entirely through the housing, a stuiling box 17 being preferably provided upon one of the caps to permit one of the shafts to extend therethrough as at 16 for the purpose of attaching a drive pulley or sprocket.

The shafts have gears 18 fixed thereon and meshing with each other whereby both shafts will rotate in unison and in opposite directions.

A plurality of circular saws`19 is Ixed Y upon each shaft 16, the saws being spaced as by the disks 20, of less diameter than the saws. As best shown in Fig. 4, the saws on 90 each shaft-are staggered with relation to the saws up'on the other shaft so that'they will interlace with each other Yin order to grind and cut the-heavy particles. of oil or other Y substance. 95

A spacing collar 21 may be located upon each shaft between the gear 18 and the disk saws and a similar collar 22 may be located ulpon the shaft between the saws and the c mping nut 23 by means of which the saws l may be fixed in proper spaced relation upon the shafts.

The housing is provided with a longitudinal rib 24 upon the inlet side adjacent to each gang ofv saws, these ribs being machined to a close fit with the teeth of the saws. The lower portion of the housing comprises an inlet chamber 25 which may have one or more inlet openings 26 communicating with oil supply pipes 27.

The upper portion of the housing comprises an attritionchamber and is preferably divided, as by the depending partition wall 28, into two similar chambers '29, one located above each gang of saws.

A perforate discharge tube 30 is located through the central portion of each chamber 29, both tubes being connected to a discharge manifold 31 which communicates with the oil line to the burners and the like.

In the operation of the mill, oil enters the chamber 25 through the inlet pipes 27 and passes up between the saws, being cut by the rotating blades and discharging above the same, the stream of milled oil being divided by the partition 28 so that substantially one-half passes into each chamber 29.

The oil being discharged into these chambers tangenti'ally will rotate in opposite directions in each chamber, rotating around the discharge tubes 30 which are concentric to the movement of the oil.

The centrifugal action of the rotating oil will throw the heavier particles thereof to the outside, bringing them repeatedly into contact with the cutting teeth of the saws until they are entirely ground and cut, and allowing the discharge of only the lighter andfner particles through the central discharge tubes 30.

Y It should be noted that the housing is enlarged adjacent to the saws, as shown at 32, being restricted below and above the same in order to slow up the movement of the oil at this point and provide for complete attrition and mixing of the same by the saws.

I claim: l

1. A rotary mill including a housing. two parallel gangs of interlacing saws within the housing, means for passing oil andthe like through the housing andl betweenthe gangs of saws, and an attrition chamber in the housing into which the oil is discharged tangentially from the saws and by the centrifugal force thus set up the heavier particles of oil are carried around and again passed through the saws.

2. A rotary mill including a housing, cutting means within the housing, means for passing oil and the like through the cutting means, an attrition chamber in the housing into which the oil is discharged tangentially from the cutting means and caused to rotate therein, and means for drawing off oil from the center of the attrition chamber.

therein, and a perforate discharge pipe cenv trally located in the attrition chamber.

4. A rotary mill including a housing, two parallel shafts within the housing, a spaced gang of interlacing saws on each shaft, means -for rotating one shaft, meshing gears upon the shafts for rotating the other shaft, and means for passing oil and the like through the housing and between the gangs of saws, and two attrition chambers separated from each other, one of the chambers being located at-the outletside of each gang of saws whereby the oil may be recirculated for furl ther attrition.

In testimony that I claim the above, I have hereunto subscribed my name.

ROBERT C. HOPKINS. 

